Device for lessening the noise of vibration in vehicles.



H. a. FARR. DEVICE FOR LESSENING THE NOISE 0F VIBRATION IN VEHICLES.

Patented Oct. 28, I902.

(Application filed Feb. 14, 1902.)

(No Model.)

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UNITED STATES PATENT, OFFICE.

HIRAM G. FARR, OF WINCHESTER, MASSACHUSETTS.

DEVICE FOR LESSEI IING THE NOISE 0F VIBRATION IN VEHICLES.

SPECIFICATION forming part of Letters Patent No. 712,281, dated October2 1902- Application filed February 14, 1902. Serial No. 94,079. (Nomodel.)

To (ZZZ whom it may concern.- 7

Be it known that I, HIRAM G. FARR, of Winchester, in the county ofMiddlesex and Commonwealth of Massachusetts, have invented certain newand useful Improvements in Devices for Lessening the Noise of Vibrationin Vehicles, of which the following is a description sufficiently full,clear, and exact to enable any person skilled in the art or science towhich said invention appertains to make and use the same, referencebeing had to the accompanying drawings, forming a part of thisspecification, in which Figure 1 is an elevation showing wheels and axleand a portion of the structure of a motor-car with my device attached,and Fig. 2 an elevation illustrating a modification.

Like letters of reference indicate corresponding parts in the differentfigures of the drawings.

My invention relates especially to a device whereby the noise resultingfrom vibration set up in the wheels, axles, and other portions of thestructure of a car by the contact of the wheels with the rails or by theaction of the motor may be deadened or decreased to such degree as tonot be objectionable.

I show herein my improvement applied to a railway-car for the purpose ofillustrating; but I do not confine myself to this, as the device isapplicable to any vehicle.

The nature and operation of the improvement will be understood by thoseconversant with such matters from the following explanation.

In the drawings, A A represent the truckwheels, and B the axle.

My device consists, primarily, in connecting two parts of any portion ofthe vehicle which is subject particularly to vibration by a copper wireof gage graduated to the size ofsuch parts. The bare ends of this wireare rigidly connected to such parts, and the remainder of body portionof said wire is covered with rubber, felt, or any well-knownnonvibratory material. In Fig. 1 the bared ends y of the wire are drivenrigidly into suitable openings in the webs of the wheels A A,respectively, and the body of said Wire, covered by non-vibratorymaterial w, is coiled around the axle B. Vibration set up in the wheelsA by impact with the rail-joints is imparted to the wire rigidlyconnected to said wheels, but is at once killed or neutralized by thecovering 0c, and thus the sound resulting is to a very material degreeovercome. Moreover, this device by thus lessening, stopping, orpartially killing the vibration prevents it from being imparted to theaxle B in marked degree. The danger of crystallization and subsequentbreaking of the axle therefrom is decreased. As is well known, car-axlesordinarily crystallize and break at the center, because the vibrationsare imparted simultaneously by the wheels at both ends. By breaking thisas described the axle has far greater life than is usual.

In Fig. 2 I show the bared end of the wire a: secured in contact withthe axle adjacent the wheel by means of a clamp z, it beingimpracticable to bore into said axle.

Any means of securing the wire may be employed, and such device may beapplied to various parts of the motor, brake mechanism,

or car-body without departing from the scope of' my invention.

Again, I find that by securing only one end of thewire to the vibratingparts and permitting the covered portion of said wire to hang loose orpendent I effect substantial re sults in this line, and although Iprefer to rigidly secure both ends I do not wish to be confined to sodoing.

Having thus described my invention, what I claim is l. A car-axle incombination with a wire having its bared ends rigidly secured to saidaxle adjacent opposite ends thereof respectively, the body of said wirebeing covered by a non-vibratory material.

2. A car axle and wheels in combination with a wire having its baredends rigidly connected respectively with said wheels, the body portionof said wire being covered by a nonvibratory material.

HIItAM e. FARR.

Witnesses:

0. M. SHAW, O. M. WILBUR.

